Trolley-head for electric cars.



C. S. BAYLEY.

TROLLEY HEAD FOR ELECTRIC BARS.

APPLIOATION rum) mm. 22, 1908.

954,014. Patented Apr. 5,1910.

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CHRRLESSPENCER BAYLEY.

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TROLLEY-HEAD FOR ELECTRIC CARS.

Specification of Letters Patent.

Patented Apr. 5, 1910.

Application filed December 22, 1908. Serial No. 468,781.

To all whom 'it may concern:

Be it known that 1, CHARLES Sermons BAYLEY, subject of the King of GreatBritain, residing at Grey'Lynn, Auckland, in the Dominion of NewZealand, have invented a new and useful Improved Trolley-Head forElectric Cars; and I do hereby declare the following to be a full,clear, and exact description of the same.

This invention relates to an improved construction of trolley head forelectric cars of that type in which the wheel is ada ted to fall backwhen it hits against any 0 the overhead gear, so that it will lie backand be incapable of entanglement with the overhead gear should thetrolley pole leave the conductor wire.

According to this invention, the head is formed with the usual socketpiece constructed with a pair of rearwardly extending checks. Thetrolley wheel is mounted in the usual manner in a fork attached to avertical spindle. This spindle is'ournaled within a casting or tumblerof peculiar form, that is pivoted between the rear ends of the checks ofthe head in such a manner that under normal conditions, the tumbler willextend forward and lie between such cheeks in order to support thetrolley wheel in the proper position for running. Should the wheel bestruck from the front by any obstacle, the tumbler will turn back andover, carrying the wheel with it, so that the wheel or fork will beturned right over, and will lie below the level of the pole end.

The tumbler is formed with a wedge sha ed end remote from its pivot end.This We ge shaped end is adapted to fit into a correspondln rest madebetween the forward ends 0 the cheeks so as to maintain the wheelupright when it is in position. The underside of the tumbler is formedwith a curved surface or guard which, when the tumbler is turned backand over, will provide for it sliding freely beneath the overhead wires.

In the accompanying drawings,Figure 1 is a side elevation of the head inthe normal running condition. Fig. 2 is a similar View of the head withthe tumbler and wheel in the position assumed when forced back. Fig. 3is a plan view of the same.

a is the socket piece of the head which is of usual form, and is formedwith rearwardly extending cheeks 6 arranged at the spindle e thatcarries the trolley wheel fork f, is journaled in the usual manner. Theside cheeks b are widened out, as at g, to form a tapered recess intowhich this bearing block will fit. The forward end of the tumbler isprovided with a wedge shaped projecting portion 71. and thecorrespondlng end of the space between the forks b is also formed with awedge shaped recess j into which the wedge h is adapted to fit. Thetumbler c is pivoted at its rear end between the rear ends of the cheeksb by means of a suitable ivot screw or the like in. It thus extendsorwardly between such cheeks, and by reason of its weight, will lienormally in such position in order to carry the trolley wheel in theproper position for running.

The wedge h fitting within the correspondingly shaped recess 7' willserve to keep the tumbler firmly in its proper position, and to preventany looseness in side play. The wheel will thereby be kept rigidlyvertical while being free to rotate on its own axis, and the fork f toswivel in the horizontal plane within its bearing block d.

Should any obstacle strike the wheel or fork from the front, or shouldsuch engage against any overhead cross wires or other gear when running,the tumbler 0 will be lifted up out of its seat between the checks 7)and turned back and over on its pivot 70, carrying the fork and trolleywheel with it also. When it moves beyond the forward pull of itsgravity, it will fall ri htback to the position shown in Figs. 2 an 3,so that the whole will be reversed and will lie mainly to the rear ofthe rear end of the head with the fork and trolley wheel below the levelthereof.

The bottom end of the tumbler is formed with a curved guard piece mextending along its length, which, when the tumbler is reversed, willcurve upwardly and rearwardly from the level of the checks 1) as shownin Fig. 2. This guard piece will serve to guide the head beneath anyoverhead fixtures with which it comes in contact when the car travelsafter the wheel has been thrown back. Consequently, the liability of thehead becoming entangled in the overhead gear upon the trolley wheelleaving the conductor wire and the pole flying up, is entirely obviated.

To replace the trolley wheel and tumbler in the proper position forrunning, it will only be necessary to pull the pole down by the ordinarycontrol rope, and then allow it to swing quickly upward for a slightdistance. The impetus of this swing will be suflicient to cause thetumbler to turn up on its pivot pin, and then to fall forward into itsnormal position.

The tumbler c is preferably formed with a short upward extension 12 nearits back end, which extension is arranged to lie closely beneath the rimof the trolley wheel in order to serve as a guard to prevent any gearcatching in such wheel when the car is running backward.

Stops 0 are arranged to project outward one on each side of the tumbler,which stops engage with the back edge of the cheeks b when the tumblerfalls back, and serve to prevent the wheel falling against such cheeks,and of any liability of damage being caused thereby.

What I do claim as my invention, and desire to secure by Letters Patent,is;

1. A trolley head having a pair of side cheeks extending rearwardly fromthe head and having a recess within the forward end of the saace betweenthe cheeks, a tumbler fitting etween said cheeks and havin awedge-shaped projection adapted to fit wlthin the recess aforesaid, saidtumbler being pivoted at its rear end to the cheeks, and a bearing blockwithin the tumbler in combi* nation with a trolley fork provided with aspindle fitting said bearing block.

2. A trolley head having apair of side cheeks extending rearwardly fromthe head, a tumbler pivoted at its rear end between said cheeks andhaving its forward end formed to fit the forward end of the spacebetween the cheeks, and having a curved guard piece along the bottomedge of the tumbler, 1n combination with a trolley-fork carried by andhaving a swiveling connection with the tumbler.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

CHARLES SPENQER BAYLEY.

Witnesses:

E. RAWHE-SMITH, E. F. COURTNEY.

